ICS1722

ICS1722 QuickSaver® Charge Controller for Nickel-Cadmium and Nickel-Metal Hydride Batteries General Description The ICS1722 is a CMOS device designed for the intelligent charge control of either nickel-cadmium (NiCd) or nickel-metal hydride (NiMH) batteries. The controller uses a pulsed-current charging technique together with voltage slope termination. The ICS1722 employs a four stage charge sequence that provides a complete recharge without overcharging. The controller has nine userselectable charge rates and six user-selectable auxiliary modes available for customized charging systems. The ICS1722 monitors for the presence of a battery and begins charging when a battery is installed. The ICS1722 is for applications where temperature sensing is not required by the charge controller. Features Charge termination methods include: Voltage slope Charge timers Four stage charge sequence: Soft start charge Fast charge Topping charge Maintenance charge Reverse-pulse charging available in all charge stages Nine programmable charge rates between 15 minutes (4C) and four hours (C/4) Continuous polling mode for battery detection Six auxiliary modes include: Discharge-before-charge Ten hour C/10 conditioning charge Direct to C/40 maintenance charge Charging system test provided through controller Adjustable open circuit (no battery) voltage reference Applications Battery charging systems for: - Portable consumer electronics - Power tools - Audio/video equipment - Communications e...